Quote from: nic202 on February 13, 2018, 02:54:50 AM

Hi,
Will give $50 worth of btc to anyone who can help me out. Assembled my 4 x 1070ti mining rig about 3 weeks ago has a 1200w corsair platinum psu, asus h270 plus mobo, 2 x 4g ddr4 ram, running windows 10

So my first problem is when i benchmark each singular gpu on its own i get good hashrates, about 460 m/hs on equihash. But when i run more then one gpu the hashrate of the others drops significantly. When i try run all 4 together i get like 720 m/hs which is trash for all 4 gpus. I have tried uninstalling and reinstalling the latest drivers for my gpus and a clean install of windows. Does anyone have any tips for this?

My second problem is with all 4 gpus running any mining software i use crashes after a few minutes of mining and just freezes my pc. I tried getting 4g more of ram to bump up my system to 8gb (improved overall stability but still get crashes). I really am stumped here and have no idea what to do with this one, have tried searching through forums but no solution has helped. Thought it was a nicehash issue, then started using nemosminer and mining pool hub. Still crashes and shit hashrates...

So, i think this may be an issue with faulty hardware. My 2 guesses are either my powersupply or my motherboard. I am guessing one of them cant support to provide enough power across the rig with more then 1 gpu. It cant be my gpus because when i plug each in separately and benchmark them they all give me good hashrates individually. Just not with more then 1 plugged in...

I have spent the past 3 weeks trying to solve this and its doing my head in, alot of lost revenue aswell so if any one has any ideas please let me know.

Thanks,

IMHO, sounds like a power issue to me. when gpu cards dont get enough power it will run slower. I see this a lot when I undervolt my cards. some cards respond better to undervolting and can clock at a higher speed, some just default to a lower speed because it doesnt get enough power. probably silicon variation.

dcjim1

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